Lubricant feed means for gyratory crushers

ABSTRACT

A gyratory crusher provided with a wobbling crusher cone supported by a dish-shaped sliding bearing on the upper end of an axially slidable piston arranged in a stationary tubular shaft and provided at the lower end of the piston with a pressure medium chamber for adjusting the piston slidably in said tubular shaft is provided with a lubricant system comprising a lubricating channel extending centrally along the axis of the entire piston and connected with its upper end with the center of said sliding bearing, while the lower end of said lubricating channel slidably engages a tubular pin which extends through said pressure medium chamber and is fixedly attached to a cover plate which closes the lower end of said tubular shaft. An exterior lubricant supply source is connected with the lower end of said tubular pin which extends through said cover plate.

United States Patent Decker et a1.

l LUBRICANT FEED MEANS FOR GYRATORY CRUSHERS [75] Inventors: HannsDecker; Heinz Hurtmanns.

both of Cologne; Helmut Stiickmann, Wesseling all of Germany [73]Assignee: Klocker-Humboldt-Deutz. AG,

Germany {22] Filed: Dec. 29. 1970 [21] Appl, No.: 102,446

[30I Foreign Application Priority Data Jan. 12 1970 Germany 201N073 [52]U.S. Cl. 1. 241/214; 2l4/208; 241/214 [51 Int. Cl. B02c 2/04 [581 Fieldof Search 241/207 208, 214. 2l5. 241/216 [56] References Cited UNITEDSTATES PATENTS l 7l7 894 (W929 Rumpcl H Z4l/2l4 3.384.3[2 5/1968Pattcrson ct al, 24l/2US l l June 24, 1975 Primary Eruminer-Robert L.Spruill Attorney, Agent. or FirmHill, Gross, Simpson. Van Santen,Steadman. Chiara & Simpson [57 I ABSTRACT A gyratory crusher providedwith a wobbling crusher cone supported by a dish-shaped sliding bearingon the upper end of an axially slidable piston arranged in a stationarytubular shaft and provided at the lower end of the piston with apressure medium chamber for adjusting the piston slidably in saidtubular shaft is provided with a lubricant system comprising alubricating channel extending centrally along the axis of the entirepiston and connected with its upper end with the center of said slidingbearing, while the lower end of said lubricating channel slidablyengages a tubular pin which extends through said pressure medium chamberand is fixedly attached to a cover plate which closes the lower end ofsaid tubular shaft. An exterior lubricant supply source is connectedwith the lower end of said tubular pin which extends through said coverplate.

1 Claim, 2 Drawing Figures :2 8 91; 1 53 PATENTEUJUH 24 ms SHEET 1ATTORA/LVS l LUBRICANT FEED MEANS FOR (IYRATORY CRUSHERS The inventionrelates to a gyratory crusher provided with a wobbling crusher conesupported by a vertically movable dishshapcd sliding bearing mounted onthe upper end of an axially adjustable piston.

ln known gyratory crushers of this type the piston is slidably supportedin a stationary tubular shaft which is fixedly attached to the housingof the gyratory crusher. The piston is hydraulically or pneumaticallyvertically adjustable. but it is not rotatable. Furthermore. there isprovided between the lower end of the piston and the housing of thegyratory crusher a cylindrical space which is charged with a suitablepressure medium. such as a pressure fluid or a gas under pressure. forthe purpose of adjusting the piston slidably in the tubular shaft.

At the upper end of the piston is arranged in most cases a sphericalsegment serving as the supporting dish of the sliding bearing. On thisspherical segment is mounted the crusher cone which by means of aneccentric sleeve. which surrounds the tubular shaft. is rotated bydriving gears so that the crusher cone performs in the crusher space awobbling movement.

A gyratory crusher of this type is disclosed in the U.S. Pat. No.3.372.881 and in this known crusher the lubricant for the lubricaion ofthe sliding bearing is supplied by a channel arranged in the housing ofthe gyratory crusher in such a manner that it avoids the space whichcontains the pressure medium for adjusting the piston. This channel inthe housing of the gyratory crusher is in communication with an annularchamber which surrounds the axially slidable piston. so that thelubricant is pumped through this channel into the mentioned annularchamber. This annular chamber is in communication with a lubricatingchannel in the piston which leads directly to a central distributionchamber in the sliding bearing. This known arrangement of a lubricatingsystem for a gyratory crusher requires. however. relatively largesealing devices. particularly around the annular chamber and in thehousing and in the neighborhood of the bearing for the piston.

These sealing devices have relatively large sealing surfaces and aninner diameter which depends on the exterior dimensions of the piston.Owing to the axial adjustability of the piston these sealing deviceswear very quickly and lubricant leaks are apt to appear at the annularchamber and this in turn leads to an insufficient lubrication of thehighly stressed bearing of the crusher cone and causes damage to thishearing. An exchange and replacement of a sealing device which hasbecome worn at the annnular chamber is. however, very difficult toaccomplish.

An object of the present invention is to provide a gyratory crusher witha lubricating feed means which in its dimensions is independent ofthediameter of the piston and which without expensive installationoperations can easily be applied to the gyratory crusher.

In accordance with the invention. the lubricating channel in the pistonis arranged in axial direction along the entire length of the piston andis connected with a tubular pin which is fixedly attached to the housingof the gyratory crusher and also is slidably and sealingly connectedwith the lubricant channel in the piston. This tubular pin extendsentirely through the cylindrical chamber provided at the lower end ofthe piston and which is charged with a pressure medium for adjusting thepiston lengthwise. This tubular pin can very easily be sealinglyconnected with the lubricating channel of the piston by providing thelower end of the lubricating channel with a cylindrical enlargementwhich in its walls is provided with sealing rings which slidably engagethe upper end of the tubular pin. the other end of which is fixedlyattached to a cover plate which closes the lower end of the tubularshaft which in turn is fixedly attached to the housing of the gyratorycrusher. Preferably the tubular pin is thrcadedly attached to thementioned cover plate or may also be welded or soldered thereto. in theembodiment of the invention illustrated. for example. in theaccompanying drawing a threaded connection establishes a tightconnection between the tubular pin and the cover plate in very simplemanner. whereby at the same time a good seal is obtained. Preferably thehollow cylindrical cn largement in the lower portion of the piston andthe cylindrical chamber below the piston are arranged in axial alignmentso that the piston can be longitudinally adjusted without anydifficulties.

For the purpose of describing the lubricating system of the inventionmore clearly. the accompanying drawing illustrates such a lubricatingsystem arranged in a gyratory crusher.

in the drawings:

FIG. 1 illustrates a vertical longitudinal section of a gyratorycrusher; and

FIG. 2 illustrates an enlargement of the lower portion of this gyratorycrusher.

Referring to FIG. 1 the stationary portion of the gymtory crushercomprises an upper portion 1 provided with a filling aperture 2, acrushing tool 3 and the housing 4. A hollow conical crusher cone 5 ismounted directly on a hollow supporting cone 6 in the interior of whichis arranged a spherical segment 7 resting on a supporting dish 8 of thesliding hearing. The transverse stresses acting on the crusher cone 5are taken up by a cylindrical bearing surface 9 on which revolves aneccentric sleeve ll driven by bevel gears 10 mounted with their drivingshaft in the housing. The eccentric sleeve H is rotatably mounted on thetubular shaft [2 which is fixedly secured with its lower end to thehousing 4 of the gyratory crusher. The supporting dish 8 of the slidingbearing is mounted on the upper end of a piston [3.

This piston 13 is axially slidably arranged in the tubular shaft 12 andis provided with a pre-tensioned spring [4 acting a safety clementagainst overloading of the crusher cone 5. The spring 14 comprises astack of individual annular springs. This spring 14 is arranged betweenthe upper part 13:! ofthe piston 13 and the lower part 13h thereof andis mounted on a guide rod which is not illustrated in the drawing. Thelower part 13b of the piston 13 extends into a cylindrical chamber 15which is filled with a pressure medium supplied by a control device.This pressure medium. for instance a pressure fluid. when pumped intothe space [5 effects a vertical adjustment of the piston 13 and therebyaccomplishes an adjustment of the size of the crusher gap [6.

For the lubrication of the sliding bearing comprising the parts 7 and 8.the piston 13 is provided with a central bore 17 which establishes acommunication with a lubricating channel 18 in the lower part [3/1 ofthe piston [3. This channel 18 also extends axially through theabovementioned guide rod for the spring 14. The lower part 13/) of thepiston is slidabiy connected with a tubular pin [9 which extendsentirely axially through the cylindrical chamber of the hydrauliccontrol device. The pin 19 extends slidably into a hollow cylindricalenlargement in the lower part l3!) of the piston. The lower or outer endof the pin 19 which extends out wardly of the housing is connected witha lubricant supply line 22.

FIG. 2 illustrates in an enlarged scale the lower part of the gyratorycrusher.

In this embodiment of the invention the outer surface of the tubularshaft 12 is shaped slightly conical. A nut 23 is applied to its lowerend and clamps the tubular shaft [2 securely in a suitable seat in thehousing 4 of the gyratory crusher. The lower part l3); of the piston 13extends into a sleeve 24, the lower end of which forms the chamber 15for the pressure medium. The pressure medium, for instance oil. issupplied or withdrawn by a pipe 25. The pressure medium serves for theadjustment of the gap 16 of the gyratory crusher.

Referring particularly to FIG. 2, it should be noted that the tubularpin 19 for feeding the lubricant into the cylindrical enlargement 20 ofthe channel 18 is threadedly connected with the closure plate 26 whichcloses the lower end of the tubular shaft 12. A hexagonal nut 27 urges asealing washer 2711 against the lower face of the closure plate 26. Thetubular pin 19 is provided with a passage extending entirely lengthwiseand axially through the pin 19. The lower or outwardly extending end ofthe pin 19 is provided with a coupling sleeve 21 which in turn isconnected with a lubricant supply line 22. The upper end 28 of thetubular pin I9 has a reduced diameter and slidably engages thehollowcylindrical enlargement 20 arranged in the lower part 13b of thepiston 13.

The hollow cylindrical enlargement 20 is preferably arranged in axialalignment with the central channel 18 in the piston I3. The wall of thishollow cylindrical enlargement 20 is provided with annular grooves inwhich sealing rings 29 are inserted which engage the circumference ofthe reduced upper portion 28 of the tubular pin 19.

The lubricant channel 18 may be connected with separate channels whichare used for directing the lubricant to additional bearings provided inthe gyratory crusherv In particular. an additional channel maybe di'rected to the arrangement of the annular springs used to cushion anoverload to which the crushing cone may be subjected in order tolubricate this spring arrangemeat.

The illustrated construction ofthe lubricating system of the imentionmay be modified in that. for instance. the tubular pin [9 is rigidlyconnected with the piston 13. In such a case the lower end of thetubular pin l9 passes slidably through a suitable passage in the wall ofthe housing 4. for instance. in the cover plate 26 which closes thelower end of the tubular shaft [2. Advantageously. the sealing devicesto be used in this case may comprise annular grooves arranged in thewall of the bore in the housing 4 through which the tubular pin l9extends outwardly. The sealing rings are then easily accessible.

What we claim is:

l. A gyratory crusher, comprising a. a housing having a feed opening atthe top thereof.

b, a crusher lining secured to said housing adjacent said top openingtherein.

c. a tubular support post stationarily mounted in an upright positionwithin said housing and having a closed bottom end.

d. a piston mounted in said tubular support post for movement axiallythereof.

e. a rotary crusher cone mounted on the upper end of said piston.

f. a substantially dish-shaped friction bearing between said crushercone and said upper end of the piston.

g. eccentric means associated with said rotary crusher cone and supportpost to impart to said crusher cone a wobbling movement,

h. means for supplying highly pressurized fluid to the variable sizechamber formed by the bottom end of said piston and said closed bottomend portion of the support post to thereby control the size of the gapbetween the crusher lining and the crusher cone.

i. a conduit extending axially through said piston from said frictionbearing to the bottom end of the piston.

j. a tubular member secured to the bottom closure of said support postand extending through said closure into said conduit in the piston insealed slidable engagement with the wall of said conduit. and

k. means for supplying low pressure lubrication fluid to the outer endof said tubular member and thereby to said friction hearing.

1. A gyratory crusher, comprising a. a housing having a feed opening atthe top thereof, b. a crusher lining secured to said housing adjacentsaid top opening therein, c. a tubular support post stationarily mountedin an upright position within said housing and having a closed bottomend, d. a piston mounted in said tubular support post for movementaxially thereof, e. a rotary crusher cone mounted on the upper end ofsaid pistoN, f. a substantially dish-shaped friction bearing betweensaid crusher cone and said upper end of the piston, g. eccentric meansassociated with said rotary crusher cone and support post to impart tosaid crusher cone a wobbling movement, h. means for supplying highlypressurized fluid to the variable size chamber formed by the bottom endof said piston and said closed bottom end portion of the support post tothereby control the size of the gap between the crusher lining and thecrusher cone, i. a conduit extending axially through said piston fromsaid friction bearing to the bottom end of the piston, j. a tubularmember secured to the bottom closure of said support post and extendingthrough said closure into said conduit in the piston in sealed slidableengagement with the wall of said conduit, and k. means for supplying lowpressure lubrication fluid to the outer end of said tubular member andthereby to said friction bearing.